Overview

The Analog Output Module (900B01-0301) provides 4 isolated 0 to 21.8 mA outputs that can be scaled by the user to any span within this range on a per-output basis. It features green and red status LEDs for operation and diagnostics indication, respectively. The module supports a user-specified failsafe value to ensure predictable operation if communication with the controller is interrupted. Outputs are updated synchronously with the IOM scan time, which has a minimum value of 500ms.

Key Features

• Outputs per Module: 4 (isolated)
• Current Range: 0 to 21.8 mA, user-selectable span
• Load Resistance: 750 ohms max
• Galvanic Isolation: 500VDC Channel to Channel, 600VDC from logic
• Accuracy: 0.1% full scale at reference conditions
• Modules per Rack: 10 max, up to 12 with ambient temperature de-rating
• Minimum Current Sensing: > 3.5 mA per output
• Calibration Data: Stored in non-volatile memory, redundant factory calibration with automatic rejection of bad versions
• Diagnostics: Monitoring of factory calibration, configuration, and +24 VDC power supply
• Output Verification: Feedback to controller indicating output current flow
• D/A Resolution: 12 bits
• Fail Safe State Configuration: Options for holding last value or setting a failsafe value
• User-Specified Scan Rate: Supported by the slew rate function block, converting maximum rate of change to milliamp output per execution cycle

Specifications Table